US20070090078A1 - Drinking sleeve for a beverage container - Google Patents
Drinking sleeve for a beverage container Download PDFInfo
- Publication number
- US20070090078A1 US20070090078A1 US11/406,632 US40663206A US2007090078A1 US 20070090078 A1 US20070090078 A1 US 20070090078A1 US 40663206 A US40663206 A US 40663206A US 2007090078 A1 US2007090078 A1 US 2007090078A1
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- United States
- Prior art keywords
- sleeve
- plastic
- annular
- neck portion
- plastic drinking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 230000035622 drinking Effects 0.000 title claims abstract description 99
- 235000013361 beverage Nutrition 0.000 title claims description 22
- 239000004033 plastic Substances 0.000 claims abstract description 153
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- 239000002184 metal Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims description 19
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- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 238000013022 venting Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/08—Threaded or like caps or cap-like covers secured by rotation engaging a threaded ring clamped on the external periphery of the neck or wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape
- B65D7/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape of curved cross-section, e.g. cans of circular or elliptical cross-section
Definitions
- the present invention relates in general to beverage containers of the type where the consumer may drink directly from the dispensing opening in the neck of the container. More specifically, the present invention relates to the addition of an externally-threaded, plastic drinking sleeve to the neck of the container to facilitate and improve the drinking experience.
- the plastic drinking sleeve of the present invention As one example of the type of beverage container that is suitable for the plastic drinking sleeve of the present invention, consider a metal beer “bottle” with a screw-on, screw-off metal cap. Without the plastic drinking sleeve of the present invention, a consumer desiring to drink directly from the bottle would need to contact a threaded metal opening while drinking. Any exposed metal edges, roughness or burrs that might be left as part of the bottle or created from the interaction of the threaded metal closing cap and the bottle would be a concern. These features could create discomfort to the consumer and might force the consumer to dispense the contents from the container into another container before consuming. While this may not be a problem in some environments, beverages of this type are often consumed when no other container is available for the transfer of contents. Therefore, the addition of a plastic drinking sleeve, according to the present invention, improves the overall fit and feel of the finished product and the overall drinking experience.
- any rough and/or exposed metal edges or burrs are either eliminated and/or covered with a smooth, molded plastic structure.
- the plastic sleeve is externally-threaded so as to receive the metal closing cap. As such, it is important that there be a secure seal so as to capture and hold the internal pressure for carbonated beverages. This requires that there be a close conforming fit and a tight threaded engagement between the plastic sleeve and the closing cap for a secure, leak-free interface, capturing and maintaining the internal pressure.
- the plastic sleeve not loosen, slip, or turn (rotate) relative to the neck of the container.
- the plastic sleeve must be securely connected or anchored to the neck so that, once assembled, there is no relative motion between the plastic sleeve and the neck of the container. Even after the opening of the container, it is important that the plastic sleeve not loosen such that it turns or rotates relative to the neck of the container. The initial removal represents a higher torque situation due to breakage of the frangible elements of the closing cap. It is also important to have an assembly procedure for the plastic sleeve that is quick and simple, yet reliable and predictable.
- the threaded plastic drinking sleeve of the present invention includes various structural features, characteristics and cooperative relationships, each of which contribute to some improvement or benefit or to some portion of an improvement or benefit of the overall closure assembly.
- the referenced closure assembly includes the container neck, the plastic sleeve, and the closing cap.
- the present invention is directed principally to the threaded plastic drinking sleeve and its fit and assembly relative to the container neck.
- An important aspect of the present invention is the embedding of part of the free edge of the metal neck directly into the plastic of the drinking sleeve. This interfit anchors and secures the drinking sleeve against turning or slippage during the removal of and during reclosing of the outer closing cap.
- This embedding step is performed after the upper portion (i.e., chimney) of the neck is curled over the top lip of the plastic drinking sleeve.
- the nature of the threaded engagement between the closing cap and the threaded plastic drinking sleeve is important in that the contents, typically under pressure, must be captured without gas or liquid leakage.
- six tear drop-shaped, inwardly protruding bumps are molded as part of the inner surface of the sleeve. These bumps provide another securing featuring as they deform the metal of the neck.
- a plastic drinking sleeve for push-on assembly to a neck portion of a beverage container includes an annular body formed by an annular sidewall defining an open interior, the annular sidewall having an open first end and, opposite to the first end, an open second end and including a series of external threads, the annular sidewall further including an inner surface that is tapered to contact the neck portion with an interference fit as the plastic drinking sleeve is pushed onto the neck portion.
- the neck portion includes a free edge that is curled over an upper edge of the drinking sleeve and embedded into the plastic material of the drinking sleeve.
- One object of the present invention is to provide an improved plastic drinking sleeve for a beverage container.
- Another objects of the present invention include providing an improved plastic drinking sleeve and beverage container combination and the method of fabricating that combination.
- FIG. 1 is an exploded view of a beverage container including a plastic drinking sleeve and metal closing cap according to one embodiment of the present invention.
- FIG. 2 is an exploded view of the plastic drinking sleeve and beverage container illustrating the first stage in their assembly sequence.
- FIG. 3 is a front elevation view, in partial section, of the FIG. 2 plastic drinking sleeve and container neck combination illustrating the second stage in the assembly procedure.
- FIG. 4 is a front elevation view, in partial section, of the plastic drinking sleeve and container neck combination showing the third stage in the assembly procedure.
- FIG. 5 is a front elevation view, in partial section, of the plastic drinking sleeve and container neck combination showing the fourth and final stage of the assembly procedure.
- FIG. 6 is a front elevation view, in full section, of the FIG. 1 plastic drinking sleeve.
- FIG. 7 is a front elevation view of the FIG. 1 plastic drinking sleeve.
- FIG. 8 is a top plan view of the FIG. 1 plastic drinking sleeve.
- FIG. 9 is an enlarged, partial, front elevational view, in full section, of an annular upper rib comprising a portion of the FIG. 1 plastic drinking sleeve.
- FIG. 10 is an exploded view of another embodiment of a plastic drinking sleeve and beverage container according to the present invention.
- FIG. 11 is a front elevational view, in full section, of the FIG. 10 plastic drinking sleeve.
- FIG. 12 is a front elevational view of the FIG. 10 plastic drinking sleeve and beverage container, as assembled with a closing cap.
- FIGS. 1-5 there is illustrated a molded plastic drinking sleeve 20 that is securely attached to the annular neck 21 of a beverage container 22 .
- the beverage container 22 is a metal beer “bottle” and plastic sleeve 20 is constructed and arranged to be permanently attached to the neck 21 .
- the outer surface of sleeve 20 is externally threaded in the form of threads 23 for receipt of an internally-threaded metal closing cap 24 .
- the container 22 can assume virtually any size and shape, but preferably there will be an annular abutment form such as shoulder 27 located at the bottom or base of the neck 21 .
- Neck 21 is a hollow annular form with two adjoining frustoconical portions 28 and 29 . While the normal or prior art style of neck profile is typically a straight conical (frustoconical) profile, this particular shape is limited to upper portion 28 .
- Lower portion 29 has been changed according to the present invention by being slightly flared in a radially outward direction. This change results in portion 29 having a greater cone angle, as measured at the apex compared to the cone angle of portion 28 .
- Neck 21 including portions 28 and 29 , is circumferentially symmetrical about its axial centerline 21 a.
- the plastic drinking sleeve 20 is a hollow, generally annular form with external threads 23 .
- Sleeve 20 is a unitary, molded plastic structure that can be fabricated from a suitable material based upon the container contents and compatibility with the metal of the container and the metal of the closing cap.
- the longitudinally opposite ends 30 and 31 each define a generally circular opening 30 a and 31 a, respectively.
- Sleeve 20 is circumferentially symmetrical about axial centerline 20 a and when sleeve 20 is properly installed on the container neck 21 , axial centerlines 20 a and 21 a should generally coincide.
- the closing cap 24 is an annular metal component that is internally threaded and provided with a frangible ring 34 at its base that locks onto the lower portion 33 of plastic drinking sleeve 20 .
- This abutment prevents further upward travel of ring 34 and with continued counterclockwise turning of closing cap 24 (unthreading), the frangible elements 38 that connect ring 34 to the remainder of closing cap 24 fracture, leaving ring 34 in recess 36 between surface 37 and shoulder 27 and permitting the closing cap 24 to be removed from sleeve 20 .
- FIGS. 6 through 9 describe further structural features of sleeve 20 including its cross-sectional form.
- a portion of the neck 21 is included so as to show the embedding of the metal of the neck 21 into the plastic of the sleeve 20 .
- plastic drinking sleeve 20 is that it is constructed and arranged to press onto or push onto neck 21 with a certain degree of dimensional interference between the inside of the plastic drinking sleeve 20 and the outside of the neck 21 of the container 22 that contributes to part of the overall secure fit between these two components.
- This degree of dimensional interference has at least two effects in terms of the sleeve and container combination.
- the present invention specifically configures the molded plastic external threads to the small side, dimensionally. This smaller or scaled-down starting size for the plastic sleeve threads, as initially molded and prior to assembly, results in the threads 23 being able to expand to the desired final dimension in terms of the thread major diameter and the thread minor diameter, once the sleeve 20 is completely pushed onto the neck 21 of container 22 .
- the upper part of the upper portion 28 is first curled over the top lip or edge 41 of the plastic drinking sleeve 20 as part of a forming and shaping operation.
- This upper portion defines the neck opening and includes a free edge 28 a.
- the upper portion 28 is then drawn down in the direction of radial shelf 42 so as to position free edge 28 a adjacent the radial shelf 42 .
- the top edge 41 of the sleeve 20 includes an upwardly extended or raised, rounded annular rib 43 as detailed in FIG. 9 .
- the shelf 42 is adjacent the base of rib 43 and surrounds rib 43 .
- the shelf 42 is substantially horizontal with the container in an upright position.
- the assembly equipment used to assemble and connect the sleeve to the neck applies a downward axial force (FA) on the top of curled-over portion 28 and an inward radial force (FR), (see FIGS. 5 and 9 ).
- FA downward axial force
- FR inward radial force
- This inward radial force is directed to the free edge 28 a and the result that is achieved is to embed at least part of the free edge 28 a into the plastic material of the sleeve 20 , see FIGS. I and 5 .
- This embedding of metal into plastic creates a secure connection that anchors the sleeve 20 to the neck 21 such that the sleeve 20 is not allowed to turn, twist, or rotate relative to the neck.
- the structural combination that is described physically pushes at lest part of the metal edge of the container neck into the body of plastic adjacent the corner junction 44 between the upper raised rib 43 and the radial shelf 42 .
- the free edge 28 a has a generally rectangular shape in cross section. This geometry includes an inside annular corner 45 and an outside annular corner 46 .
- the embedding of edge 28 a into the plastic material of the sleeve 20 results in corner 45 being embedded into the base of rib 43 and corner 46 being embedded into radial shelf 42 .
- the free edge 28 a is now captured and encased in plastic. If top portion 28 is merely curled over the top edge 41 of sleeve 20 so as to try and conform to the rounded shape of rib 43 , then the free edge 28 a is directed at shelf 42 . Without the embedding step, the free edge 28 a remains exposed. This then exposes outside corner 46 and permits the user to contact this annular corner edge 46 while drinking. Embedding of free edge 28 a into the plastic material of sleeve 20 prevents having any exposed corner edge.
- the free edge 28 a has the ability to flex outwardly over time. Whether attributable to spring back of the curled over metal or whether due to differences in the thermal coefficients, or whether due to simply use and handling, the possibility exists. If the radial width of shelf 42 exceeds the wall thickness of portion 28 , then presumably the initial fabrication will inset free edge 28 a radially inside of outer surface 49 of sleeve 20 . While this may lessen the risk of user contact with corner edge 46 , at least initially, there is nothing to prevent portion 28 from deflecting outwardly. This then could push corner edge 46 beyond surface 49 , creating an unacceptable condition due to the presence of the protruding corner edge 46 .
- the installation or assembly sequence of the plastic sleeve 20 onto neck 21 is illustrated in four steps or stages. Beginning or starting with the illustration in FIG. 2 , the neck 21 of the container is presented for receipt of the unitary, molded plastic drinking sleeve 20 which goes to the neck by axial movement (push-on) including a sliding interference fit of sleeve 20 onto neck 21 .
- the sleeve 20 is pushed onto the neck 21 and the sizes, shapes, and contours of the sleeve engage the upper and lower frustoconical portions 28 and 29 , respectively.
- the lower portion 29 has a slightly flared profile and this shape creates added interference to the aforementioned dimensional interference as the sleeve 20 begins to encounter lower portion 29 .
- the present invention includes the additional step of embedding at least a portion of the metal free edge 28 a directly into the plastic material of sleeve 20 .
- a downward axial force FA is applied to the formed over or curled portion (uppermost) of portion 28 , as shown in FIG. 5 .
- an inward radial force FR is applied to the free edge 28 a.
- the described embedding is more than simply surface contact that might distort the plastic without actually penetrating the plastic. Instead, the described embedding actually causes the annular corner edges 45 and 46 to dig into the plastic material of the sleeve 20 at the two described locations, see FIG. 9 .
- the free edge 28 a that includes end surface 50 extending between corners 45 and 46 has a wall thickness of approximately 0.016 inches (0.406 mm).
- the inner surface 53 includes a tapered portion extending downwardly from upper end 31 to lower end 30 .
- the angle of taper for the inner surface 53 from end 31 to end 30 is preferably 11 ⁇ 2 degrees, but the present invention contemplates that a suitable taper can range from 1 degree up to 2 degrees.
- the direction of taper is outwardly diverging from end 31 to end 30 . This taper provides adequate clearance to forego the need for any lead-in chamfer.
- additional surface contact area is provided as part of the inner surface 53 of sleeve 20 for more complete engagement of the sleeve inside surface against the outer surface of neck 21 . It is envisioned that having more surface area contact between sleeve 20 and neck 21 will assist in holding sleeve 20 in place on neck 21 .
- the primary anchoring of the sleeve 20 onto the neck 21 so as to prevent sleeve 20 turning or rotating relative to neck 21 is achieved by the embedding step.
- the closing cap 24 can be properly threaded onto and off of the sleeve 20 without also turning or rotating the sleeve 20 on the neck 21 . This means that the closing cap 24 can be fully tightened as part of the filling and capping procedures in order to properly close the container and seal in the contents.
- the closing cap 24 is to be removed from the sleeve 20 , whether the first time in order to sever the frangible ring 34 or subsequently while the contents are being consumed, the closing cap 24 accurately tracks the external threads 23 without any slippage between the sleeve 20 and neck 21 .
- the upper lip of sleeve 20 that is described as top edge 41 includes the raised annular rib 43 and the radial shelf 42 .
- the rib 43 has a generally semi-circular upper portion 57 and a generally rectangular lower portion 58 .
- Broken lines 59 a and 59 b provide the dividing or boundary lines for portions 57 and 58 .
- Upper portion 57 has a radius of approximately 0.020 inches (0.508 mm).
- the generally rectangular form of lower portion 58 measures approximately 0.040 inches (1.016 mm) by 0.016 inches (0.406 mm).
- shelf 42 is substantially horizontal when centerline 20 a is vertical.
- the radial width of shelf 42 is approximately 0.023 inches (0.584 mm).
- the notch 60 in top edge 41 is provided for gating of the mold.
- Slots 61 are provided for venting of the gas from within the container at the time of removing the closing cap 24 .
- the cross section of FIG. 9 is described as an axial cross section since the cutting plane is parallel to the axial centerline 20 a.
- the capping procedure for the disclosed combination involves the automated (threaded) assembly of the closing cap 24 onto sleeve 20 .
- the initial assembly of the closing cap 24 includes seating of the frangible ring 34 portion into the annular recess 36 below radial lip 35 .
- One of the realities of structures of this type in terms of the sleeve 20 and closing cap 24 is the need for the thread pitches to be closely matched for the best fit and a securely connected, tightly sealed interface.
- the technique that is used is to use tracking rollers to trace the threads on the sleeve by pushing against a closing cap pre-form and thereby control the fabrication of the closing cap 24 based on the thread specifics.
- the tracking or tracing rollers continue to travel even after the profile of the threads has been traced and the threads on the closing cap formed. This roller equipment continues to run even after tracing the threaded profile, even though no new shape information is being generated.
- the cap begins as a metal form or preform that needs to be properly sized and shaped in order to conform to the neck of the container, in this case, it needs to be conformed to the neck, as fitted with plastic sleeve 20 .
- the closing cap 24 will ultimately end up as an internally-threaded component, but initially the metal preform is not threaded.
- the threads are created by conforming that metal preform to the size and shape of the external threads of plastic sleeve 20 .
- the threads on the closing cap 24 will be sized and shaped to closely conform to the external threads on the plastic sleeve. This is virtually guaranteed by using the size, shape, and threaded form of the plastic sleeve profile as the mandrel for shaping the metal closing cap.
- the plastic sleeve as a shaping mandrel, there is a high degree of correspondence and a better fit and function for the finished closing cap 24 as it fits onto threaded plastic sleeve 20 .
- the plastic sleeve 20 can vary or change slightly as part of the plastic molding process and since it can change again when pushed onto the neck 21 of container 22 , using the plastic sleeve profile as a mandrel helps to “match” the closing cap being fabricated with the plastic sleeve that receives the cap. This higher degree of conformance or correspondence helps to ensure a tightly closed combination that provides the requisite sealing.
- This closing cap-to-plastic sleeve fit also helps to ensure that the frangible ring 34 will separate properly and that the closing cap 24 will not become a “spinner”.
- the term “spinner” is used for closures that do not break the frangible ring when twisted off. The same term is used to describe closures that have been turned the wrong way (i.e., clockwise) on opening, stripping the thread while not breaking the frangible ring.
- closing cap 24 The closing cap fabrication and the subsequent capping process or procedure for roll-on-pilfer-proof (ROPP) closures (i.e., closing cap 24 ) is a high-speed event.
- a typical production line provides a capping head that is lowered automatically over the metal preform of the closing cap as it is positioned over the plastic sleeve 20 .
- a pressure is applied that creates a seal between the sleeve and any cap liner material.
- a spring pivot system causes the equipment rollers to move inwardly. These rollers engage the outer surface of the metal preform for closing cap 24 and push the metal inwardly as the rollers track the threaded form of the plastic sleeve that was pushed onto the neck 21 of container 22 .
- the forming of the metal of the closing cap preform using the plastic sleeve 20 as a mandrel, creates the necessary threaded form for the closing cap 24 that precisely matches and closing conforms to that particular plastic sleeve.
- the capping equipment does not have the “intelligence” to stop the rollers from continuing to roll around the exterior of the closing cap once the threaded form is created and the capping completed.
- the present invention though approaches a solution to this issue not by modifying the roller equipment, but instead by incorporating into the external threads 23 of sleeve 20 a stop in the form of a roller abutment 61 .
- This roller abutment or stop 61 is unitarily formed at the base of the external threads 23 on a minor diameter surface. As the roller encounters this abutment 61 , the roller travel stops. There is no continued movement of the roller and no time or equipment utilization inefficiency as a result of adding the thread stop 61 for roller abutment.
- the roller abutment 61 has a half-moon shape and functions as a door stop to the roller travel. As the tracing or tracking roller would otherwise keep spinning, this roller abutment 61 provides a stopping point and further provides a better looking capped assembly.
- Sleeve 80 is constructed and arranged to be securely attached to the annular neck 81 of a beverage container 82 .
- the outer surface of sleeve 80 is externally threaded in the form of threads 83 for receipt of an internally-threaded metal closing cap 84 (see FIG. 12 ).
- Plastic drinking sleeve 80 is a unitary, molded plastic structure having a hollow, generally annular form.
- Sleeve 80 can be fabricated from a variety of different plastic materials that are suitable for the container contents and compatible with the metal of the container 82 and the metal of the closing cap 84 .
- the selected plastic material for sleeve 80 is PET. This material is preferred due to its harder nature as compared to a plastic material such as HDPE. The harder PET material is also suitable as a material for plastic drinking sleeve 20 .
- the selected composition should be a bottle resin grade.
- the longitudinally opposite ends 90 and 91 of sleeve 80 each define a generally circular opening 90 a and 91 a, respectively.
- the plastic drinking sleeve 80 includes two interior features and three exterior features that can be used together, separately, or in any combination of two or three or four as disclosed herein as part of the present invention. While these various features cooperate to provide an improved plastic sleeve, these features individually provide a benefit or improvement, albeit less than what all together would contribute as a cooperative group.
- Sleeve 80 is circumferentially symmetrical about axial centerline 80 a and, when sleeve 80 is properly installed on the container neck 81 , axial centerlines 80 a and 81 a should generally coincide.
- the closing cap 84 is virtually identical in form, fit, and function to closing cap 24 .
- the description of closing cap 24 relative to sleeve 20 and container 22 is the same as the description for closing cap 84 relative to sleeve 80 and container 82 .
- a first aspect of the overall construction of plastic drinking sleeve 80 is that is presses onto or pushes onto neck 81 and there is a certain degree of dimensional interference between the plastic drinking sleeve 80 and the neck 81 of the container 82 that contributes to the overall secure fit between these two components.
- This degree of dimensional interference has at least two effects in terms of the sleeve and container combination.
- the present invention specifically configures the molded plastic external threads to the small side dimensionally.
- the degree of dimensional interference influences how tightly the sleeve 80 fits onto the neck 81 as the sleeve 80 is pushed onto the neck.
- the inner surface 101 of the plastic sleeve 80 is molded with an equally-spaced series of six (6) tear drop-shaped raised projections or bumps 102 . These bumps extend away from inner surface 101 in a radially inward direction toward axial centerline 80 a.
- the presence of these bumps 102 noting the use of a harder plastic (i.e., PET), means that these bumps 102 push in and deform the metal of the neck in the form of spaced-apart indentations as the sleeve 80 is pushed onto the neck 81 with an interference fit.
- the final assembly of sleeve 80 onto container 82 and closing cap 84 onto sleeve 80 is illustrated in FIG. 12 .
- a suitable plastic drinking sleeve would include, with or without all of the other features as disclosed herein, at least either the rib 43 ( 103 ), or the bumps 102 , or both of these features working together in combination.
- sleeve 80 includes the six ( 6 ) tear drop-shaped raised projections or bumps 102 .
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Abstract
Description
- The present application is a continuation-in-part patent application of U.S. patent application Ser. No. 11/247,902, filed Oct. 10, 2005, entitled “BEVERAGE CONTAINER WITH THREADED PLASTIC DRINKING SLEEVE” which is hereby incorporated by reference in its entirety.
- The present invention relates in general to beverage containers of the type where the consumer may drink directly from the dispensing opening in the neck of the container. More specifically, the present invention relates to the addition of an externally-threaded, plastic drinking sleeve to the neck of the container to facilitate and improve the drinking experience.
- As one example of the type of beverage container that is suitable for the plastic drinking sleeve of the present invention, consider a metal beer “bottle” with a screw-on, screw-off metal cap. Without the plastic drinking sleeve of the present invention, a consumer desiring to drink directly from the bottle would need to contact a threaded metal opening while drinking. Any exposed metal edges, roughness or burrs that might be left as part of the bottle or created from the interaction of the threaded metal closing cap and the bottle would be a concern. These features could create discomfort to the consumer and might force the consumer to dispense the contents from the container into another container before consuming. While this may not be a problem in some environments, beverages of this type are often consumed when no other container is available for the transfer of contents. Therefore, the addition of a plastic drinking sleeve, according to the present invention, improves the overall fit and feel of the finished product and the overall drinking experience.
- By applying a threaded plastic sleeve to the neck of the bottle, any rough and/or exposed metal edges or burrs are either eliminated and/or covered with a smooth, molded plastic structure. The plastic sleeve is externally-threaded so as to receive the metal closing cap. As such, it is important that there be a secure seal so as to capture and hold the internal pressure for carbonated beverages. This requires that there be a close conforming fit and a tight threaded engagement between the plastic sleeve and the closing cap for a secure, leak-free interface, capturing and maintaining the internal pressure.
- Whether during the capping procedure at the time of filling the container or at the time the closing cap is being removed (unscrewed) for the first time, it is essential that the plastic sleeve not loosen, slip, or turn (rotate) relative to the neck of the container. The plastic sleeve must be securely connected or anchored to the neck so that, once assembled, there is no relative motion between the plastic sleeve and the neck of the container. Even after the opening of the container, it is important that the plastic sleeve not loosen such that it turns or rotates relative to the neck of the container. The initial removal represents a higher torque situation due to breakage of the frangible elements of the closing cap. It is also important to have an assembly procedure for the plastic sleeve that is quick and simple, yet reliable and predictable.
- The threaded plastic drinking sleeve of the present invention includes various structural features, characteristics and cooperative relationships, each of which contribute to some improvement or benefit or to some portion of an improvement or benefit of the overall closure assembly. The referenced closure assembly includes the container neck, the plastic sleeve, and the closing cap. The present invention is directed principally to the threaded plastic drinking sleeve and its fit and assembly relative to the container neck. An important aspect of the present invention is the embedding of part of the free edge of the metal neck directly into the plastic of the drinking sleeve. This interfit anchors and secures the drinking sleeve against turning or slippage during the removal of and during reclosing of the outer closing cap. This embedding step is performed after the upper portion (i.e., chimney) of the neck is curled over the top lip of the plastic drinking sleeve. Additionally, the nature of the threaded engagement between the closing cap and the threaded plastic drinking sleeve is important in that the contents, typically under pressure, must be captured without gas or liquid leakage. Finally, as part of one embodiment of the present invention, six tear drop-shaped, inwardly protruding bumps are molded as part of the inner surface of the sleeve. These bumps provide another securing featuring as they deform the metal of the neck.
- A plastic drinking sleeve for push-on assembly to a neck portion of a beverage container, according to one embodiment of the present invention, includes an annular body formed by an annular sidewall defining an open interior, the annular sidewall having an open first end and, opposite to the first end, an open second end and including a series of external threads, the annular sidewall further including an inner surface that is tapered to contact the neck portion with an interference fit as the plastic drinking sleeve is pushed onto the neck portion. The neck portion includes a free edge that is curled over an upper edge of the drinking sleeve and embedded into the plastic material of the drinking sleeve.
- One object of the present invention is to provide an improved plastic drinking sleeve for a beverage container.
- Other objects of the present invention include providing an improved plastic drinking sleeve and beverage container combination and the method of fabricating that combination.
- Related objects and advantages of the present invention will be apparent from the following description.
-
FIG. 1 is an exploded view of a beverage container including a plastic drinking sleeve and metal closing cap according to one embodiment of the present invention. -
FIG. 2 is an exploded view of the plastic drinking sleeve and beverage container illustrating the first stage in their assembly sequence. -
FIG. 3 is a front elevation view, in partial section, of theFIG. 2 plastic drinking sleeve and container neck combination illustrating the second stage in the assembly procedure. -
FIG. 4 is a front elevation view, in partial section, of the plastic drinking sleeve and container neck combination showing the third stage in the assembly procedure. -
FIG. 5 is a front elevation view, in partial section, of the plastic drinking sleeve and container neck combination showing the fourth and final stage of the assembly procedure. -
FIG. 6 is a front elevation view, in full section, of theFIG. 1 plastic drinking sleeve. -
FIG. 7 is a front elevation view of theFIG. 1 plastic drinking sleeve. -
FIG. 8 is a top plan view of theFIG. 1 plastic drinking sleeve. -
FIG. 9 is an enlarged, partial, front elevational view, in full section, of an annular upper rib comprising a portion of theFIG. 1 plastic drinking sleeve. -
FIG. 10 is an exploded view of another embodiment of a plastic drinking sleeve and beverage container according to the present invention. -
FIG. 11 is a front elevational view, in full section, of theFIG. 10 plastic drinking sleeve. -
FIG. 12 is a front elevational view of theFIG. 10 plastic drinking sleeve and beverage container, as assembled with a closing cap. - For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
- Referring to
FIGS. 1-5 , there is illustrated a moldedplastic drinking sleeve 20 that is securely attached to theannular neck 21 of abeverage container 22. In the illustrative embodiment ofFIG. 1 , thebeverage container 22 is a metal beer “bottle” andplastic sleeve 20 is constructed and arranged to be permanently attached to theneck 21. The outer surface ofsleeve 20 is externally threaded in the form ofthreads 23 for receipt of an internally-threadedmetal closing cap 24. - In terms of the overall shapes and geometries, the
container 22 can assume virtually any size and shape, but preferably there will be an annular abutment form such asshoulder 27 located at the bottom or base of theneck 21.Neck 21 is a hollow annular form with two adjoiningfrustoconical portions upper portion 28.Lower portion 29 has been changed according to the present invention by being slightly flared in a radially outward direction. This change results inportion 29 having a greater cone angle, as measured at the apex compared to the cone angle ofportion 28.Neck 21, includingportions axial centerline 21 a. - The
plastic drinking sleeve 20 is a hollow, generally annular form withexternal threads 23.Sleeve 20 is a unitary, molded plastic structure that can be fabricated from a suitable material based upon the container contents and compatibility with the metal of the container and the metal of the closing cap. The longitudinallyopposite ends circular opening Sleeve 20 is circumferentially symmetrical aboutaxial centerline 20 a and whensleeve 20 is properly installed on thecontainer neck 21,axial centerlines - The
closing cap 24 is an annular metal component that is internally threaded and provided with afrangible ring 34 at its base that locks onto thelower portion 33 ofplastic drinking sleeve 20. Once theclosing cap 24 is securely (initially) tightened ontosleeve 20 at the time of filling,ring 34 locks beneathradial lip 35 intoannular recess 36. Retrograde turning ofclosing cap 24 so as to axiallymove closing cap 24 upwardly off ofsleeve 20 causes ring 34 to abut up against theunderside surface 37 ofradial lip 35. This abutment prevents further upward travel ofring 34 and with continued counterclockwise turning of closing cap 24 (unthreading), thefrangible elements 38 that connectring 34 to the remainder of closingcap 24 fracture, leavingring 34 inrecess 36 betweensurface 37 andshoulder 27 and permitting theclosing cap 24 to be removed fromsleeve 20. - With continued reference to
FIGS. 1-5 , the structural details ofplastic drinking sleeve 20 will be described, including its installation procedure and sequence so as to secure thesleeve 20 onto theneck 21 ofcontainer 22. DrawingFIGS. 6 through 9 describe further structural features ofsleeve 20 including its cross-sectional form. InFIG. 9 , a portion of theneck 21 is included so as to show the embedding of the metal of theneck 21 into the plastic of thesleeve 20. - One aspect of the overall construction of
plastic drinking sleeve 20 is that it is constructed and arranged to press onto or push ontoneck 21 with a certain degree of dimensional interference between the inside of theplastic drinking sleeve 20 and the outside of theneck 21 of thecontainer 22 that contributes to part of the overall secure fit between these two components. This degree of dimensional interference has at least two effects in terms of the sleeve and container combination. First, there is some degree of dimensional expansion to the outer surface ofplastic sleeve 20 as it is pressed on or pushed onto theneck 21. It is estimated that there is approximately an 8 percent size expansion of the outer profile of thesleeve 20. This dimensional expansion affects the thread size in terms of the thread major diameter and the thread minor diameter. There is a size difference (8 percent) between the free dimensions prior to installation and the dimensions after the sleeve is pressed onto the neck. In order to compensate for the dimensional expansion that is experienced as the plastic sleeve is pushed onto the neck with an interference fit, the present invention specifically configures the molded plastic external threads to the small side, dimensionally. This smaller or scaled-down starting size for the plastic sleeve threads, as initially molded and prior to assembly, results in thethreads 23 being able to expand to the desired final dimension in terms of the thread major diameter and the thread minor diameter, once thesleeve 20 is completely pushed onto theneck 21 ofcontainer 22. There is in effect a first thread major diameter and a first thread minor diameter prior to assembly ofsleeve 20 and then larger second thread major and minor diameters after assembly. Secondly, the degree of dimensional interference influences how tightly thesleeve 20 fits onto theneck 21 as thesleeve 20 is pushed onto the neck. - It has been learned that a press fit or interference fit alone, between the
sleeve 20 andneck 21, may not be sufficient under all conditions to prevent slippage or rotation of thesleeve 20 as theclosing cap 24 is removed (unscrewed) and reapplied to thesleeve 20 to close the container. For example, under certain temperature fluctuations or variations, the different coefficients of thermal expansion and contraction between metal and plastic can loosen the interference fit between thesleeve 20 and theneck 21. If the degree of interference fit is increased in order to try and solve this particular problem, it is anticipated that it will be more difficult to press thesleeve 20 onto theneck 21 without creating undesirable distortion of the sleeve or damage to the sleeve. While some degree of interference fit is desirable, having another structural interfit or connection between thesleeve 20 andneck 21 is believed to be beneficial, if not necessary, in order to achieve the requisite anchoring of thesleeve 20 to theneck 21 so that thesleeve 20 does not turn, slip, or rotate during use. - In order to achieve this additional structural connection, i.e., anchoring, of
sleeve 20 toneck 21, the upper part of theupper portion 28 is first curled over the top lip or edge 41 of theplastic drinking sleeve 20 as part of a forming and shaping operation. This upper portion defines the neck opening and includes afree edge 28 a. Theupper portion 28 is then drawn down in the direction ofradial shelf 42 so as to positionfree edge 28 a adjacent theradial shelf 42. Thetop edge 41 of thesleeve 20 includes an upwardly extended or raised, roundedannular rib 43 as detailed inFIG. 9 . Theshelf 42 is adjacent the base ofrib 43 and surroundsrib 43. Theshelf 42 is substantially horizontal with the container in an upright position. The assembly equipment used to assemble and connect the sleeve to the neck applies a downward axial force (FA) on the top of curled-overportion 28 and an inward radial force (FR), (seeFIGS. 5 and 9 ). This inward radial force is directed to thefree edge 28 a and the result that is achieved is to embed at least part of thefree edge 28 a into the plastic material of thesleeve 20, see FIGS. I and 5. This embedding of metal into plastic creates a secure connection that anchors thesleeve 20 to theneck 21 such that thesleeve 20 is not allowed to turn, twist, or rotate relative to the neck. The structural combination that is described physically pushes at lest part of the metal edge of the container neck into the body of plastic adjacent thecorner junction 44 between the upper raisedrib 43 and theradial shelf 42. Thefree edge 28 a has a generally rectangular shape in cross section. This geometry includes an insideannular corner 45 and an outsideannular corner 46. The embedding ofedge 28 a into the plastic material of thesleeve 20 results incorner 45 being embedded into the base ofrib 43 andcorner 46 being embedded intoradial shelf 42. - While the original objective of the embedding step of the metal into the plastic was to securely anchor the sleeve to the neck to prevent any relative turning, slipping, or rotation, additional benefits have been realized as a result of this connection method and structure. First, the
free edge 28 a is now captured and encased in plastic. Iftop portion 28 is merely curled over thetop edge 41 ofsleeve 20 so as to try and conform to the rounded shape ofrib 43, then thefree edge 28 a is directed atshelf 42. Without the embedding step, thefree edge 28 a remains exposed. This then exposesoutside corner 46 and permits the user to contact thisannular corner edge 46 while drinking. Embedding offree edge 28 a into the plastic material ofsleeve 20 prevents having any exposed corner edge. - Secondly, without the embedding step, the
free edge 28 a has the ability to flex outwardly over time. Whether attributable to spring back of the curled over metal or whether due to differences in the thermal coefficients, or whether due to simply use and handling, the possibility exists. If the radial width ofshelf 42 exceeds the wall thickness ofportion 28, then presumably the initial fabrication will insetfree edge 28 a radially inside ofouter surface 49 ofsleeve 20. While this may lessen the risk of user contact withcorner edge 46, at least initially, there is nothing to preventportion 28 from deflecting outwardly. This then could pushcorner edge 46 beyondsurface 49, creating an unacceptable condition due to the presence of the protrudingcorner edge 46. - Further, without the embedding step there is a seam or separation gap between the
end surface 50 offree edge 28 a and theupper surface 51 ofradial shelf 42. This separation creates a collection trap for debris that is difficult to wipe away since it can work its way up into the interface betweenrib 43 andportion 28. In order to help prevent this problem, other manufacturers have elected to introduce the added step of applying some coating or sealant. This added step represents an expenditure of time and money that is not required with the structure proposed by the present invention. - Referring to
FIGS. 2-5 , the installation or assembly sequence of theplastic sleeve 20 ontoneck 21 is illustrated in four steps or stages. Beginning or starting with the illustration inFIG. 2 , theneck 21 of the container is presented for receipt of the unitary, moldedplastic drinking sleeve 20 which goes to the neck by axial movement (push-on) including a sliding interference fit ofsleeve 20 ontoneck 21. InFIG. 3 , thesleeve 20 is pushed onto theneck 21 and the sizes, shapes, and contours of the sleeve engage the upper and lowerfrustoconical portions lower portion 29 has a slightly flared profile and this shape creates added interference to the aforementioned dimensional interference as thesleeve 20 begins to encounterlower portion 29. - As illustrated in
FIG. 4 , continued force or pressure in an axial direction onsleeve 20 pushes it fully ontoneck 21 into a fully assembled condition with regard to the axial position between the two. In this condition, thelower end 30 ofsleeve 20 approachesshoulder 27 and will preferably contactshoulder 27. The fully assembled condition ofsleeve 20 ontoneck 21, as illustrated inFIG. 4 , leavesannular chimney portion 52 ofneck 21, axially extending above or beyond theupper end 41 ofsleeve 20.Annular chimney portion 52 is then formed over and around raised annular rib 43 (seeFIG. 5 ) with thefree edge 28 a directed toward and in close proximity to theradial shelf 42 andadjacent corner junction 44. If the assembly and connection steps would stop here, then this formed-over configuration would cooperate with the interference fit to prevent any upward axial travel ofsleeve 20 relative toneck 21. Any downward axial travel ofsleeve 20 relative toneck 21 is prevented in part byshoulder 27 and in part by the interference fit ofplastic sleeve 20 ontoneck 21. - However, the assembly and connection steps do not stop with simply curling the
chimney portion 28 over and around raisedannular rib 43. The present invention includes the additional step of embedding at least a portion of the metalfree edge 28 a directly into the plastic material ofsleeve 20. In order to perform this step, a downward axial force FA is applied to the formed over or curled portion (uppermost) ofportion 28, as shown inFIG. 5 . Concurrently, an inward radial force FR is applied to thefree edge 28 a. These two forces cooperate to embed insidecorner 45 into the base of the raisedannular rib 43, directly above thecorner junction 44. These two forces also cooperate to embed outsidecorner 46 into theradial shelf 42. The described embedding is more than simply surface contact that might distort the plastic without actually penetrating the plastic. Instead, the described embedding actually causes the annular corner edges 45 and 46 to dig into the plastic material of thesleeve 20 at the two described locations, seeFIG. 9 . Thefree edge 28 a that includesend surface 50 extending betweencorners - Referring now to
FIG. 6 , theplastic sleeve 20 is illustrated in full section form to help show the specific geometry of the various portions and sections and their spatial and functional relationships. Theinner surface 53 includes a tapered portion extending downwardly fromupper end 31 tolower end 30. One omitted feature of note is that there is no lead-in chamfer inarea 54 as would normally be seen or expected aroundlower end 30. The angle of taper for theinner surface 53 fromend 31 to end 30 is preferably 1½ degrees, but the present invention contemplates that a suitable taper can range from 1 degree up to 2 degrees. The direction of taper is outwardly diverging fromend 31 to end 30. This taper provides adequate clearance to forego the need for any lead-in chamfer. By omitting any lead-in chamfer adjacentlower end 30, additional surface contact area is provided as part of theinner surface 53 ofsleeve 20 for more complete engagement of the sleeve inside surface against the outer surface ofneck 21. It is envisioned that having more surface area contact betweensleeve 20 andneck 21 will assist in holdingsleeve 20 in place onneck 21. The primary anchoring of thesleeve 20 onto theneck 21 so as to preventsleeve 20 turning or rotating relative toneck 21 is achieved by the embedding step. By preventing any turning or rotation of thesleeve 20 relative toneck 21, theclosing cap 24 can be properly threaded onto and off of thesleeve 20 without also turning or rotating thesleeve 20 on theneck 21. This means that theclosing cap 24 can be fully tightened as part of the filling and capping procedures in order to properly close the container and seal in the contents. When theclosing cap 24 is to be removed from thesleeve 20, whether the first time in order to sever thefrangible ring 34 or subsequently while the contents are being consumed, theclosing cap 24 accurately tracks theexternal threads 23 without any slippage between thesleeve 20 andneck 21. - With continued reference to
FIG. 6 and with added reference toFIGS. 7-9 , additional details ofplastic sleeve 20 are illustrated. The upper lip ofsleeve 20 that is described astop edge 41 includes the raisedannular rib 43 and theradial shelf 42. In the section views ofFIGS. 6 and 9 , therib 43 has a generally semi-circularupper portion 57 and a generally rectangularlower portion 58.Broken lines portions Upper portion 57 has a radius of approximately 0.020 inches (0.508 mm). The generally rectangular form oflower portion 58 measures approximately 0.040 inches (1.016 mm) by 0.016 inches (0.406 mm). With respect toaxial centerline 20 a,shelf 42 is substantially horizontal when centerline 20 a is vertical. The radial width ofshelf 42 is approximately 0.023 inches (0.584 mm). Thenotch 60 intop edge 41 is provided for gating of the mold.Slots 61 are provided for venting of the gas from within the container at the time of removing theclosing cap 24. The cross section ofFIG. 9 is described as an axial cross section since the cutting plane is parallel to theaxial centerline 20 a. - The capping procedure for the disclosed combination involves the automated (threaded) assembly of the
closing cap 24 ontosleeve 20. The initial assembly of theclosing cap 24 includes seating of thefrangible ring 34 portion into theannular recess 36 belowradial lip 35. One of the realities of structures of this type in terms of thesleeve 20 andclosing cap 24 is the need for the thread pitches to be closely matched for the best fit and a securely connected, tightly sealed interface. The technique that is used is to use tracking rollers to trace the threads on the sleeve by pushing against a closing cap pre-form and thereby control the fabrication of theclosing cap 24 based on the thread specifics. In this manner, whatever expansion or reshaping of thesleeve 20 takes place when the sleeve is assembled onto the container neck, these variables will be considered and utilized in fabricating a “matching” closing cap. The variations that might occur from one assembledsleeve 20 to another are read by the tracing or tracking roller and translated into the sizing and shaping of the cooperating threads of themetal closing cap 24. This procedure creates a closer and better fittingmetal closing cap 24 that is specifically matched for a correspondingplastic sleeve 20. - One of the concerns with the presently available tracking roller equipment is that the tracking or tracing rollers continue to travel even after the profile of the threads has been traced and the threads on the closing cap formed. This roller equipment continues to run even after tracing the threaded profile, even though no new shape information is being generated. As a result, there is a time and equipment utilization inefficiency. More specifically, in the manufacturing process directed to creating and applying the
metal closing cap 24, the cap begins as a metal form or preform that needs to be properly sized and shaped in order to conform to the neck of the container, in this case, it needs to be conformed to the neck, as fitted withplastic sleeve 20. Theclosing cap 24 will ultimately end up as an internally-threaded component, but initially the metal preform is not threaded. The threads are created by conforming that metal preform to the size and shape of the external threads ofplastic sleeve 20. Ideally the threads on theclosing cap 24 will be sized and shaped to closely conform to the external threads on the plastic sleeve. This is virtually guaranteed by using the size, shape, and threaded form of the plastic sleeve profile as the mandrel for shaping the metal closing cap. With use of the plastic sleeve as a shaping mandrel, there is a high degree of correspondence and a better fit and function for thefinished closing cap 24 as it fits onto threadedplastic sleeve 20. - Since the
plastic sleeve 20 can vary or change slightly as part of the plastic molding process and since it can change again when pushed onto theneck 21 ofcontainer 22, using the plastic sleeve profile as a mandrel helps to “match” the closing cap being fabricated with the plastic sleeve that receives the cap. This higher degree of conformance or correspondence helps to ensure a tightly closed combination that provides the requisite sealing. This closing cap-to-plastic sleeve fit also helps to ensure that thefrangible ring 34 will separate properly and that theclosing cap 24 will not become a “spinner”. The term “spinner” is used for closures that do not break the frangible ring when twisted off. The same term is used to describe closures that have been turned the wrong way (i.e., clockwise) on opening, stripping the thread while not breaking the frangible ring. - The closing cap fabrication and the subsequent capping process or procedure for roll-on-pilfer-proof (ROPP) closures (i.e., closing cap 24) is a high-speed event. A typical production line provides a capping head that is lowered automatically over the metal preform of the closing cap as it is positioned over the
plastic sleeve 20. A pressure is applied that creates a seal between the sleeve and any cap liner material. - As the capping head rotates, a spring pivot system causes the equipment rollers to move inwardly. These rollers engage the outer surface of the metal preform for closing
cap 24 and push the metal inwardly as the rollers track the threaded form of the plastic sleeve that was pushed onto theneck 21 ofcontainer 22. The forming of the metal of the closing cap preform, using theplastic sleeve 20 as a mandrel, creates the necessary threaded form for theclosing cap 24 that precisely matches and closing conforms to that particular plastic sleeve. The published paper entitled “Understanding The Roll-On-Pilfer-Proof Process” by J. Langley, Dr. A. Yoxall, and Prof. John Yates of the Department of Mechanical Engineering, The University of Sheffield, UK, and P. Taylor of Tinsley Bridge Ltd., Sheffield, UK, provides a discussion of this process. - As described, the capping equipment does not have the “intelligence” to stop the rollers from continuing to roll around the exterior of the closing cap once the threaded form is created and the capping completed.
- It would therefore be an improvement to this fabrication and capping process to modify the roller equipment to eliminate or reduce these inefficiencies. The present invention though approaches a solution to this issue not by modifying the roller equipment, but instead by incorporating into the
external threads 23 ofsleeve 20 a stop in the form of aroller abutment 61. This roller abutment or stop 61 is unitarily formed at the base of theexternal threads 23 on a minor diameter surface. As the roller encounters thisabutment 61, the roller travel stops. There is no continued movement of the roller and no time or equipment utilization inefficiency as a result of adding thethread stop 61 for roller abutment. - The
roller abutment 61 has a half-moon shape and functions as a door stop to the roller travel. As the tracing or tracking roller would otherwise keep spinning, thisroller abutment 61 provides a stopping point and further provides a better looking capped assembly. - With reference to
FIGS. 10 and 11 , there is illustrated another embodiment of a moldedplastic drinking sleeve 80 according to the present invention.Sleeve 80 is constructed and arranged to be securely attached to theannular neck 81 of abeverage container 82. The outer surface ofsleeve 80 is externally threaded in the form ofthreads 83 for receipt of an internally-threaded metal closing cap 84 (seeFIG. 12 ). -
Plastic drinking sleeve 80 is a unitary, molded plastic structure having a hollow, generally annular form.Sleeve 80 can be fabricated from a variety of different plastic materials that are suitable for the container contents and compatible with the metal of thecontainer 82 and the metal of theclosing cap 84. In the preferred embodiment, the selected plastic material forsleeve 80 is PET. This material is preferred due to its harder nature as compared to a plastic material such as HDPE. The harder PET material is also suitable as a material forplastic drinking sleeve 20. The selected composition should be a bottle resin grade. - The longitudinally opposite ends 90 and 91 of
sleeve 80 each define a generallycircular opening plastic drinking sleeve 80 includes two interior features and three exterior features that can be used together, separately, or in any combination of two or three or four as disclosed herein as part of the present invention. While these various features cooperate to provide an improved plastic sleeve, these features individually provide a benefit or improvement, albeit less than what all together would contribute as a cooperative group.Sleeve 80 is circumferentially symmetrical aboutaxial centerline 80 a and, whensleeve 80 is properly installed on thecontainer neck 81,axial centerlines - The
closing cap 84 is virtually identical in form, fit, and function to closingcap 24. The description ofclosing cap 24 relative tosleeve 20 andcontainer 22 is the same as the description for closingcap 84 relative tosleeve 80 andcontainer 82. - A first aspect of the overall construction of
plastic drinking sleeve 80 is that is presses onto or pushes ontoneck 81 and there is a certain degree of dimensional interference between theplastic drinking sleeve 80 and theneck 81 of thecontainer 82 that contributes to the overall secure fit between these two components. This degree of dimensional interference has at least two effects in terms of the sleeve and container combination. First, there is some degree of dimensional expansion to the outer surface ofplastic sleeve 80 as it is pressed on or pushed ontoneck 81. It is estimated that there is approximately an eight percent (8%) size expansion of the outer profile of thesleeve 80. This dimensional expansion affects the thread size in terms of the thread major diameter and the thread minor diameter. There is a size different (eight percent) between the free dimensions prior to installation and the dimensions after thesleeve 80 is pressed onto the neck. In order to compensate for the dimensional expansion that is experienced as the plastic sleeve is pushed onto the neck with an interference fit, the present invention specifically configures the molded plastic external threads to the small side dimensionally. This smaller or scaled-down starting size for the plastic sleeve threads, as initially molded and prior to assembly, results in thethreads 83 being able to expand to the desired final dimension in terms of the thread major diameter and the thread minor diameter, once thesleeve 80 is fully and property installed ontoneck 81 ofcontainer 82. There is in effect a first thread major diameter and first thread minor diameter prior to assembly ofsleeve 80 and then larger second thread major and minor diameters after assembly. - Secondly, the degree of dimensional interference influences how tightly the
sleeve 80 fits onto theneck 81 as thesleeve 80 is pushed onto the neck. In order to enhance the tightness and security of the sleeve-to-neck connection, the inner surface 101 of theplastic sleeve 80 is molded with an equally-spaced series of six (6) tear drop-shaped raised projections or bumps 102. These bumps extend away from inner surface 101 in a radially inward direction towardaxial centerline 80 a. - Further, the presence of these
bumps 102, noting the use of a harder plastic (i.e., PET), means that thesebumps 102 push in and deform the metal of the neck in the form of spaced-apart indentations as thesleeve 80 is pushed onto theneck 81 with an interference fit. The final assembly ofsleeve 80 ontocontainer 82 andclosing cap 84 ontosleeve 80 is illustrated inFIG. 12 . - Considering only the rounded
annular rib bumps 102, or both of these features working together in combination. - The assembly steps and their sequence for the assembly of
sleeve 80 ontoneck 81 ofcontainer 82 are substantially the same as the steps described in conjunction withsleeve 20, including the use of roundedannular rib 103, similar torib 43, and the curling of the metal of the chimney as described in conjunction with the first embodiment. The only structural difference in terms of what occurs in the sequence of assembly steps betweensleeve 80 andsleeve 20 is thatsleeve 80 includes the six (6) tear drop-shaped raised projections or bumps 102. - While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims (43)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US11/406,632 US7946436B2 (en) | 2005-10-10 | 2006-04-19 | Beverage container with threaded plastic drinking sleeve |
EP06254972A EP1772391B1 (en) | 2005-10-10 | 2006-09-26 | Metal beverage container with drinking sleeve |
CA2561064A CA2561064C (en) | 2005-10-10 | 2006-09-26 | Drinking sleeve for a beverage container |
BRPI0604238-4A BRPI0604238A (en) | 2005-10-10 | 2006-10-05 | drinking glove for a drink container |
AU2006225284A AU2006225284B2 (en) | 2005-10-10 | 2006-10-06 | Drinking sleeve for a beverage container |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/247,902 US20070080128A1 (en) | 2005-10-10 | 2005-10-10 | Beverage container with threaded plastic drinking sleeve |
US11/406,632 US7946436B2 (en) | 2005-10-10 | 2006-04-19 | Beverage container with threaded plastic drinking sleeve |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/247,902 Continuation-In-Part US20070080128A1 (en) | 2005-10-10 | 2005-10-10 | Beverage container with threaded plastic drinking sleeve |
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US20070090078A1 true US20070090078A1 (en) | 2007-04-26 |
US7946436B2 US7946436B2 (en) | 2011-05-24 |
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US11/406,632 Expired - Fee Related US7946436B2 (en) | 2005-10-10 | 2006-04-19 | Beverage container with threaded plastic drinking sleeve |
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US (1) | US7946436B2 (en) |
EP (1) | EP1772391B1 (en) |
AU (1) | AU2006225284B2 (en) |
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CA (1) | CA2561064C (en) |
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US20180312304A1 (en) * | 2006-08-22 | 2018-11-01 | Stolle Machinery Company, Llc | Metal bottle seal |
US10384838B2 (en) * | 2006-08-22 | 2019-08-20 | Stolle Machinery Company, Llc | Metal bottle seal |
US20130075355A1 (en) * | 2010-05-27 | 2013-03-28 | Pascal Probst | Container having a threaded closure sleeve |
US8573422B1 (en) * | 2010-07-02 | 2013-11-05 | Thomas W Dillon | Aluminum champagne bottle |
US20130020276A1 (en) * | 2011-07-22 | 2013-01-24 | Craig Allen Madaus | Segmented Collapsible Container |
US8763829B2 (en) * | 2011-07-22 | 2014-07-01 | Craig Allen Madaus | Collapsible container for holding liquids or objects |
USD821874S1 (en) * | 2012-02-17 | 2018-07-03 | The Coca-Cola Company | Bottle |
US8678211B1 (en) * | 2012-10-24 | 2014-03-25 | Shin-Shuoh Lin | Pressed double layer lip hydration bottle |
USD791593S1 (en) * | 2015-07-17 | 2017-07-11 | Cj Cheiljedang Corp. | Container for food packing |
US20200156827A1 (en) * | 2016-04-04 | 2020-05-21 | Sci Lllp | Outsert for swing cap assembly |
CN110167848A (en) * | 2017-02-15 | 2019-08-23 | 日本克乐嘉制盖株式会社 | Container cover including metal master and synthetic resin liner |
Also Published As
Publication number | Publication date |
---|---|
CA2561064C (en) | 2014-01-21 |
BRPI0604238A (en) | 2007-11-13 |
EP1772391A2 (en) | 2007-04-11 |
CA2561064A1 (en) | 2007-04-10 |
AU2006225284B2 (en) | 2012-03-01 |
US7946436B2 (en) | 2011-05-24 |
AU2006225284A1 (en) | 2007-04-26 |
EP1772391A3 (en) | 2008-06-11 |
EP1772391B1 (en) | 2012-07-04 |
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